common/board_f: Make reserve_mmu generic

Introduce arch_reserve_mmu to allow for architecture-specific reserve_mmu
routines. Also, define a weak nop stub for it.

Signed-off-by: Ovidiu Panait <ovpanait@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/lib/cache.c

@@ -121,7 +121,7 @@ void invalidate_l2_cache(void)
 }
 #endif
 
-__weak int reserve_mmu(void)
+int arch_reserve_mmu(void)
 {
 	return arm_reserve_mmu();
 }

common/board_f.c

@@ -385,6 +385,11 @@ static int reserve_round_4k(void)
 	return 0;
 }
 
+__weak int arch_reserve_mmu(void)
+{
+	return 0;
+}
+
 static int reserve_video(void)
 {
 #ifdef CONFIG_DM_VIDEO
@@ -951,9 +956,7 @@ static const init_fnc_t init_sequence_f[] = {
 	reserve_pram,
 #endif
 	reserve_round_4k,
-#ifdef CONFIG_ARM
+	arch_reserve_mmu,
-	reserve_mmu,
-#endif
 	reserve_video,
 	reserve_trace,
 	reserve_uboot,

include/init.h

@@ -129,6 +129,18 @@ int testdram(void);
  */
 int arch_reserve_stacks(void);
 
+/**
+ * arch_reserve_mmu() - Reserve memory for MMU TLB table
+ *
+ * Architecture-specific routine for reserving memory for the MMU TLB table.
+ * This is used in generic board init sequence in common/board_f.c.
+ *
+ * If an implementation is not provided, it will just be a nop stub.
+ *
+ * Return: 0 if OK
+ */
+int arch_reserve_mmu(void);
+
 /**
  * init_cache_f_r() - Turn on the cache in preparation for relocation
  *
@@ -145,7 +157,6 @@ int init_cache_f_r(void);
 int print_cpuinfo(void);
 #endif
 int timer_init(void);
-int reserve_mmu(void);
 int misc_init_f(void);
 
 #if defined(CONFIG_DTB_RESELECT)